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| Influence of Piezoelectric Element on Hydrogen Adsorption of Pt--supported Activated Carbon |
| LI Xuan1,2, NI Wen1, HUANG Jianyang2, ZHANG Zheng2 |
1.State Key Laboratory for High--Efficient Mining and Safety of Metal Mines of Ministry of Education, School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijng 100083, China
2.Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan 49931, USA |
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Cite this article:
LI Xuan NI Wen HUANG Jianyang ZHANG Zheng. Influence of Piezoelectric Element on Hydrogen Adsorption of Pt--supported Activated Carbon. Chin J Mater Res, 2010, 24(5): 550-554.
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Abstract Mixing Pt--coated activated carbon with secondary activated carbon as adsorbent was used for hydrogen storage. Behaviors of hydrogen adsorption on Pt--supported activated carbon in the presence of a piezoelectric element were investigated. Hydrogen storage in activated carbons can be increased by secondary hydrogen spillover from a supported Pt catalyst. The piezoelectric element is able to autogenously generate charges in hydrogen pressure. The observed adsorption enhancements of NAC, Pt/NAC--1, Pt/NAC--2 and Pt/NAC--3 are 15\%, 36.5\%, 39.3\% and 43.9\%, respectively. The greater enhancement observed from hydrogen adsorption on Pt/NAC samples can be attributed to charges generated by PMN--PT facilitate dissociation of hydrogen molecules into hydrogen atoms. The easier accessibility of the atomic orbital might favor the electron transfer from the atomic hydrogen to charged carbon.
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Received: 24 February 2010
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